z+z-z+z-z=7

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Solution for z+z-z+z-z=7 equation: 



z+z-z+z-z=7

We move all terms to the left:

z+z-z+z-z-(7)=0

We add all the numbers together, and all the variables

z-7=0

We move all terms containing z to the left, all other terms to the right

z=7

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